Created by the Google Brain team and initially released to the public in 2015, TensorFlow is an open source library ... work with—for example, by using the relatively simple Keras API for ...

It's possible to create neural networks from raw code. But there are many code libraries you can use to speed up the process. These libraries include Microsoft CNTK, Google TensorFlow, Theano, PyTorch ...

Here are some of the main features of Keras: Developed by Facebook, PyTorch is an open-source machine learning Python library that is based on Torch, a C programming language framework.